SEOUL, South Korea (AP) — South Korea says the United States and North Korea will meet again this month in an unidentified Asian country ahead of their leaders' planned second summit in Vietnam in late February.

US envoy for North Korea Stephen Biegun (C) at Incheon international airport, South Korea, on February 3. Biegun visited Pyongyang from Seoul to prepare for an upcoming summit between North Korean leader Kim Jong Un and US President Donald Trump. (Photo: VCG)

The US special representative for North Korea, Stephen Biegun, visited Pyongyang last week to work out details of the summit between President Donald Trump and North Korean leader Kim Jong Un.

South Korea's presidential office spokesman said Sunday that the US and North Korea used Biegun's trip as a chance to explain what concrete steps they want from each other.

Spokesman Kim Eui-kyeom says a follow-up US-North Korea meeting ahead of the summit will take place in a third country in Asia in the week that begins Feb. 17.